I think the word would be "increases" because if you think about it technically, you know that friction is always going to move against your force so if the force pushing against you is larger, then you would also need to exert more force.
Friction has the nature of opposing the motion of the object.
An increase in the friction force results in an increase in the amount of force applied to the object.
When the surface of an object comes into contact with the other surface, the irregularities between the two surfaces cause a force that is inverse in nature of the motion. This force is called friction force.
Force applied on the surface of the object for motion creates friction between the object and the surface. This friction opposes the motion and started decreasing the speed of the motion. To increase the speed of the motion, we need to apply more force.
Hence we can conclude that with the increase in friction, applied force increases.
To know more about friction, follow the link given below.
https://brainly.com/question/13357196.
